Portable lamp



March 1, 1949. s. R. NAYSMITH PORTABLE LAMP Filed Dec. 6. 1945 INVENTOR .M/ae'YRNAYsmm Patented Mar. 1, 1949 UNITED STATES PATENT OFFICE PORTABLE LAMP ShirleytR. Naysmith, Meridn, 001111., assignor to The Miller Company, Meridcn, Conn, a corporation of Connecticut Application December 6, 1945, Serial No. 633,097

4 Claims. (01. 240'----81) The present invention relates to portable lamps andis more particularly directedtoward portable lamps employing a single upright lamp bulb arranged to provide an indirect lighting 2 inner surfaces of the'translucent material. The light is transmitted as indicated by the circle 20 and a very substantial portion of the light is directed upwardly because of the shape of the translucent material. This upwardly dir'etited component; and a diffused direct lighting com- 5 ponent and having an enclosing translucent light fails on t pper portion of the t a sshade, lucent shade It so that it is lighted up. As the According to the present invention the lamp shade l6 obtains all its light from light difiusely bulb is associated with an enclosure extending transmitted t ou the translucent member, from the region of the lamp socket up to the 10 the entire shade can be lighted up very evenly. level of the maximum diameter portion of the In Fi 1 the m l reflector I4 is indicated 11 This endosure has t ximu di as being a specular reflector which directs the eter at substantially the level of the lamp filal h it epts downwardly toward the difment and below this level of the lamp filament is fusing trar ism1tter. In constructions such as light diffusing. Immediately above this maxi- 15 SPOWH 111 Flgulje the enclosllle made p Of t mum diameter portion, the enclosure is also light ilght transmitting and reflecting elements 3 and diffusing. This latter light diffusing portion is M y extend om about to 30 above the adapted to produce a substantial amount of horizontal H. In the drawing the structure extransmitted light directed in regions above the tendsup to the horizontal so as to illuminate the upper part 20 In the arrangement Shown 111 Fi ure 2, the f the Outer enclosing shack lamp and socket are received in an enclosure The accompanying drawings Show f 2i made up of a single piece of light transmitposes of illustrating the present invention, two ting ter al- The maximum diameter of this embodiments in which t invention may t enclosure 1s approximately at the level of the light form, it being understood that the drawings are 25 solilceh upper reentrant port on 22 of the illustrative of the invention rather than limitenclosure 15 e shown as occupying app i t same mately 20 above the horizontal. It may occupy In these drawings: a region of from about 15 to 25 but cannot be Figure 1 is a vertical sectional View through brought in as close to the lamp as the metal one for of t ti a d reflector of Figure 1 because of the danger of Figure 2 is a vertical sectional view through Overheating the glass or pla p y h another form of construction. reentrant portion 22 of the enclosure here acts In Figure 1 the lamp ID has its filament at the same as in Figure 1 and directs an adequate H and is carried in an upwardly opening lamp amount of light upwardly to illuminate the upper socket l2 in the usual manner. Here the enpart of the shade. closure is made in two parts, the lower piece Since it is obvious that the invention may be being a glass or plastic shade l3 while the upembodied in other forms and constructions withper piece of the enclosure I4 is in the form of in the scope of the claims, I wish it to be undera metal reflector M. The reflector l4 carries stood that the particular forms shown are but a metal reflector l5 adapted to allow light to esa few of these forms, and various modifications 'cape upwardly as will be obvious. An outer and changes being possible, I do not otherwise translucent shade "5, a generally conical shade, limit myself in any way with respect thereto. extends downwardly from the top of the reflech t is claimedis; 1. A portable lamp comprising an upwardly The h z a thr u t p fi am nt is opening lamp socket, an upright incandescent indicated by the line lll1 and the maximum lamp i t Socket having a bulb and a fil t diameter of the glass or plastic portion of the below the maximum diameter portion of the bulb, enclosure s at approximately tile level of the an opaque reflector extending upwardly and-outfilament. Immediately above this maximum Wardly from adjacent the large diameter portion diameter portion, the translucent part of the of the bulb to allow a cone of light in the region enclosure indicated at I8 is reentrant and is of zenith to escape for indirect lighting, a transnearly horizontal. It will receive a substantial lucent conical shade extending downwardly from amount of light flux in the general direction of the top of the reflector to below the level of the the arrow [9 falling on it, however, in all disocket, and an enclosure for the bulb below the rections because of e diffuse reflection of h reflector and for the socket, the enclosure having an upwardly and outwardly flaring lower portion intercepting substantially all the downward light flux and diffusely transmitting it downwardly below the shade and toward the lower portion of the shade, and a reentrant translucent portion at approximately the elevation of the filament of the lamp intercepting generally horizontal light and transmitting and directing it toward the upper portion of the shade.

2. A lamp comprising an upwardly opening lamp socket, an incandescent lamp in the socket having a bulb and a filament below the maximum diameter portion of the bulb in the socket, an inwardly concave enclosure about the lamp and socket, the enclosure having a lower upwardly and outwardly flaring, light diffusing portion below the level of the lamp filament, and an upper porupper part of the upper portion of theenclosure isa downwardly acting opaque reflector.

tion extending inwardly from the top of the lowerportion through an angle of substantially 15 to 30 and inwardly to be adjacent the maximum diameter portion of the bulb, an opaque reflector extending upwardly andoutwardly from the top of-the enclosure, and an outer downwardly and outwardly fiaring translucent shade extending downwardly from the top of the reflector, the up- SHIRLEY R. NAYSMITH.

- REFERENCES CITED The following references are of record in the file of this patent:

'UNITED STATES PATENTS Number Name Date 188,339 Chinnock Mar. 13, 1877 241,730 Schneider May 17, 1881 1,121,196 McKinnie Dec. 15, 1914 1,596,184 Hotchkin ..i. Aug. 17, 1926 1,701,653 'Ames Feb. 12, 1929 

